| Description |
1 online resource (192 pages) |
| Contents |
Cover; Title; Copyright; Contents; Preface; Foreword; About the authors; Acknowledgements; 1 Introduction; 1.1 General background; 1.2 Limitations of current track design practices; 1.3 New developments in SMART-UOW approach; 1.4 Scope; 2 Parameters for track design; 2.1 General background; 2.2 Typical ballasted track problems; 2.3 Typical input parameters for track design; 2.4 Substructure of ballasted tracks; 2.5 Ballast; 2.5.1 Ballast characteristics; 2.6 Sub-ballast, subgrade/formation soils; 2.6.1 Sub-ballast/filtration layer; 2.6.2 Subgrade; 2.7 Geosynthetics; 2.8 Design criteria |
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2.9 Traffic conditions2.10 Rail and sleeper properties; 3 Bearing capacity of ballasted tracks; 3.1 Introduction; 3.2 Calculation of design wheel load (P); 3.2.1 AREA (1974) method; 3.2.2 Eisenmann (1972) method; 3.2.3 ORE (1969) method; 3.3 Calculation of maximum rail seat load; 3.3.1 AREA (1974) method; 3.3.2 ORE (1969) method; 3.3.3 Raymond (1977) method; 3.4 Calculation of ballast/sleeper contact pressure; 3.4.1 AREA (1974) method; 3.5 Bearing capacity of ballast; 4 Thickness of granular layer; 4.1 Introduction; 4.2 Procedure to determine the thickness of ballast and capping layer |
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4.2.1 Design procedure4.3 Equivalent modulus and strain analysis; 4.4 Determination of track modulus; 4.4.1 Introduction; 4.5 Determining the resilient modulus of ballast, MR; 4.5.1 Empirical relationship to determine resilient modulus; 4.5.2 Measured field values of dynamic track modulus; 5 Effect of confining pressure and frequency on ballast breakage; 5.1 Introduction; 5.2 Determination of ballast breakage; 5.3 Influence of confining pressure on ballast breakage; 5.3.1 Prototype testing and experimental simulations |
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5.3.2 Laboratory study on the effect of confining pressure on ballast degradation5.3.3 Prediction of axial strains and ballast breakage; 5.3.4 Resilient modulus of ballast; 5.4 Influence of frequency on ballast breakage; 5.5 Volumetric behaviour of ballast under monotonic and cyclic loading; 6 Impact of ballast fouling on rail tracks; 6.1 Introduction; 6.2 Quantifying of ballast fouling; 6.3 Relation among fouling quantification indices; 6.4 Influence of ballast fouling on track drainage; 6.4.1 Drainage requirements; 6.4.2 Fouling versus drainage capacity of track |
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6.5 Fouling versus operational train speed6.6 Determining VCI in the field; 7 Application of geosynthetics in railway tracks; 7.1 Types and functions of geosynthetics; 7.2 Geogrid reinforcement mechanism; 7.3 Use of geosynthetics in tracks -- UOW field measurements and laboratory tests; 7.3.1 Track construction at Bulli; 7.4 Measured ballast deformation; 7.5 Traffic-induced stresses; 7.6 Optimum geogrid size for a given ballast; 7.7 Role of geosynthetics on track settlement; 7.7.1 Predicted settlement of fresh ballast; 7.7.2 Predicted settlement of recycled ballast |
| Notes |
7.7.3 Settlement reduction factor |
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Print version record |
| Form |
Electronic book
|
| Author |
Ngo, Trung
|
| ISBN |
9780429996313 |
|
0429996314 |
|
